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Finding the Fourth Proportional to 285,483.38, 393,938.40 and 170,739

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Solution

The fourth proportional to 285,483.38, 393,938.40 and 170,739 is: 235,602.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,483.38 : 393,938.40 = 170,739 : x
  2. Step 2: Convert to fraction form
    285,483.38/393,938.40 = 170,739/x
  3. Step 3: Cross multiply
    285,483.38x = 393,938.40 × 170,739
  4. Step 4: Simplify right side
    285,483.38x = 67,260,648,477.60
  5. Step 5: Solve for x
    x = 67,260,648,477.60/285,483.38
  6. Step 6: Final answer
    x = 235,602.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.